Incinerator



April 7, 1959 R. M. PETERSON ET AL 2,880,682

' INCINERATOR Filed July so, 1956 2 sheets-smeet g JNVENToR. RUSSELL M. PETERSON v PHUL W SPENCER United States Pate lNciNEnAroR Russell M. Peterson and Paul` W. Spencer, `Minneapolis,

and Gordon R. Peterson and Bruce F. McLouth, Hopkms, Minn., assignors to Burn-Zo] Co., Minneapolis, lVIinn., a corporation of Minnesota Application `luly 30, 1956, Serial No. 600,819l

7 Claims. (Cl. 110-18) This invention relates to incinerators and more speciically relates to the access ports of openings of the incinerator.

An object of our invention is to provide a new and improved incinerator of simple and inexpensive construction which is constructed and arranged to be readily and .easily fed through a building wall.

Another object of our invention is to provide an incinerator wherein the air inlet is arranged to produce air flow into the combustion chamber in such a manner as to cause maximum burning of the combustibles therein.

Still another object of our invention is the provision ofanovel incinerator which is constructed to substantially eliminate all smoking and the possibility of a ash back through the feed door when the sarne is opened.

A further object of our invention is to provide an improved incinerator wherein opening of the feed door causes closing of the normal air inlet to provide draft into.the fire pot, and also causes draft to be drawn throughthe feed opening to prevent smoking and virtually eliminate the possibility of flash backs through the-,feed opening.

A still further object of our invention is to provide a new and novel double door construction in the feed opening which is cooperatively arranged with the combustion chamber air inlet so that the outside door remains at such low temperatures as to be safely manually touched.

A still further object of our invention is the provision of new incinerator construction which may be readily and easily installed outside the building in such an arrangement with relation to other installations, that the incinerator may be fed through the building wall and ready and easy access may be had to the clean out door.

These and other objects and advantages of our invention will more fully appear from the following description made in connection with the accompanying drawings wherein like reference characters refer to the same parts throughout the several views and in which:

Fig. 1 is a perspective view of the incinerator cornprising the present invention and shown mounted adjacent a building wall;

Fig. 2 is a transverse horizontal section view taken substantially at 2-2 in Fig. 1;

Fig. 3 is a transverse vertical section view taken through the incinerator and the building wall and showing the clean-out door positioned with respect to the feed opening differently than as shown in Fig. l;

Fig. 4 is a detail` horizontal section view taken substantially on a plane as indicated at 4-4 in Fig. 3; and

Fig. 5 is a detail side elevation view of the feed door assembly disposed on the inner side of the building wall..

As best seen in Figs. 1 and 2, the incinerator which is indicated in general by numeral will be mounted Patented Apr. 7, e

on a solid base 11 adjacent a building wall W so that the incinerator` may be fed through the wall. In the form shown, the incineratorv is mounted outside of the building but of course it should be understood that the incinerator could as well be placed in a special room within the building wherein the necessary construction will be provided in the walls to conform to the building codes in relation to furnace rooms and the like.

The incinerator defines afre pot 12 which is substantially circular in configuration. The upright cylindrical` wall 13 is formed of-an external steel plate wall sheath 14 which is formed in two sections including a lower section 14a and an upper section 14h. Of course the lower section 14a is secured to the base 11 and the lower section is provided with an annular ledge 15 at the upper marginal edge thereof, which ledge may be formed of ak T-angle iron suitably secured as by welding to the lower sheath section 14a. The upper wall sheath section 14h is identical in configuration to the lower sheath section 14a and is supported upon the annular ledge 15. The upper sheath section 14h is also provided with an annular ledge 16 on the upper marginal edge thereof, which ledge may also be formed of T-angle iron suitably secured as by welding to the upper sheath section 14h. A top-enclosing hood 17 having a cylindrical depending wall portion 17a is supported uponV the ledge 16. rl`he hood 17 merely rests upon the ledge 16 and is not aflixedly secured thereto but is merely frictionally engaged so as to normally hold itself in position. The hood 17 has a smoke and gas outlet opening 18 formed in thecentralvportion thereof anda stack-receiving mounting sleeve 19 extends upwardlyV from the hood 18 in concentric relation with theI smoke outlet 1S. A stack 20 is telescopically inserted into the sleeve 19 and is supported on the marginal opening-definingy edge portions 21 of the hood 18 adjacent the opening 18. Stack 20 will be supported from the building wall W as by means of the brace 22 which is secured to the building wall by means of a bracket 23 and a swingable connection therebetween. A band 24 secures the upper end of brace 22 to the stack 20. The swingable connections between brace 22 and band 24 at one end and bracket 23 at the other end permit limited upper movement of the stack under certain conditions which will be more fully set forth hereinafter.

After the wall sheath 14 is put into place, an inner lining 25 is built of conventionally styled fire bricks or the like.

The lower wall sheath section has a clean-out opening 26 therein and a suitable door-mounting assembly 27 is also secured to the lower sheath section to swingablyV mount a clean-out door 28.

A feedv opening is also formed in the tire pot wall 13 through the upper sheath section 14b and of course through the tire brick lining 25. Enclosure means are provided for defining a feed passage 30 and for defining an air intake passage 31 in communication with the feed opening 29 in the side wall 13 of the incinerator. Such enclosure means include a feed neck section 32 which is substantially rectangular in cross section to define the inner end of feed passage 30 and which is fixedly secured as by welding to the feed opening-defining portions of the wall sheath 14, and such enclosure means also includesa fire door mounting feed section 33 and au access door mounting outer feed section 34. The building wall W is, of course, provided with an opening 35 therein and the outer feed section 33 and the inner feed section 34 are both received in the opening 35 in the wall and the outer and the inner feed section -34 is telescopicallyreceived into the outer feed section 33. A angle clip 36 is secured to the wall W as by lag bolts and aflixedly secured to the inner feed section 34 for securing the same to the Wall.

A pair of feed doors 37 and 3S are movably mounted Within the material feeding passage 30 for normally obstructing substantially all air ow therethrough and for confining the heat within the tire pot of the incinerator. Feed door 37 comprises a fire door which includes a metallic sheath or casing 39 and a heat resisting liner 40 which is constructed of fre brick or other suitable heat resistant material. The feed door 38 comprises an access door and is disposed on the inner side of the building wall W. The access door 38 is constructed of rigid sheet material such as steel plate and is movable transversely out of the feed passage 30.

The inner feed section 34 is provided with means for movably mounting the feed door 38 and in the form shown, the inner feed section is provided with an elongated guide slot 41 in the side and bottom walls 34a and 34]: respectively, and the top wall 34e is continuous. A pair of vertical door guides which comprise angle irons 42 in the form shown, are disposed on opposite sides of the slot 41 and on both sides of the inner feed section 34 for guiding the access door 38 in Vertical movement. The door guides are xedly secured as by welding to the side walls 34a of the outer feed section 34. A pair of spacer elements or door stops 43 are disposed on opposite sides of the inner feed section 34 and are respectively disposed between opposed guide members 42 for limiting the downward movement of the access door 38. It will be noted that the lower ends of the door guides or angle irons 42 are xedly secured together by a pair of braces 44. A depending handle 45 is afxedly secured to the lower marginal edge portion of the access door 38.

As best seen in Fig. 5, the door 33 is provided with a pair of outstanding mounting ears at the opposite sides thereof and adjacent the upper edge portion thereof and each of the ears 46 has an apertured mounting bracket 47 secured thereto or formed integrally thereof. A door suspending rod member 48 has its opposite ends afxed to the mounting brackets 47 of the door 38 and the suspending rods 48 have an apertured plate 49 secured thereto at the upper portion thereof for connection with an elongated liexible suspending element 50 which in the form shown comprises a cable.

The outer feed section 33 is provided with a slot 51 in the side and top walls 33a and 3319 respectively thereof, and the bottom wall 33e of the outer feed section 33 is continuous. A pair of upright and inwardly facing re door guides or channels 52 are afxedly secured to the opposite side walls 33a of the outer feed section 33 and to the wall W, and the channels 52 slidably carry the opposite sides of the tire door 37 therein. The tire door 37 is thereby adapted to move upwardly out of the material feed passage 30. A rigid eyelet 53 is axed to the upper portion of fire door 37 and is connected with the cable t) to provide a cooperative door-opening and closing relation between feed doors 37 and 38.

Guide means are provided in the wall W for carrying cable Sil and suspending the feed doors 37 and 38. ln the form shown, a tubular guide 54 extends through the wall W and has a pair of pulleys 55 journalled on the opposite ends thereof for carrying cable 5t).

It will be noted that the outer feed section 33 is slidably received into the feed neck 32 and the bottom and side walls 33C and 33a respectively engage the corresponding walls of the feed neck section 32 in close fitting relation so as to prevent air ow therebetween. The upper wall 32a of the feed neck 32 is disposed well above the top wall 33b of the outer feed section 33 to thereby define the air inlet opening 3i. The air inlet 3l thereby opens to the atmosphere adjacent the guide channels 52 for the re door 37. When the re door 37 is raised to open the feed passage 30, the air intake opening 31 is closed.

Means are provided adjacent the feed opening 29 and the incinerator side wall 13 for directing the inwardly moving air downwardly. In the form shown, such means comprise a baffle 56 which is secured to the upper wall 32a of the feed neck section and depends therefrom substantially at the feed opening 29 and the baffle 56 is aixedly secured to the opposite side walls of the feed neck section 32.

In operation, the accumulated combustible material C disposed in the lower portion of the re pot 12 will be ignited and will progressively burn from the top of the collected materials toward the bottom thereof. The inflow of air through the air inlet 3l is directed downwardly by the bafe 56 substantially as indicated by the plurality of arrows A and the downwardly directed fiow of air causes an air turbulence as indicated by the arrows within the re pot l2 in the area just above the flames. The turbulent air in the tire pot continuously agitates the ashes formed as a result of combustion and causes continuous exposure of unburned combustible materials so that the burning of the materials will be thorough and complete. The turbulent air prevents the formation of any insulating layer of ash on top of the unburned combustible materials which, of course, would have the effect of restricting burning of the materials. Of course as materials are burned, smoke and combustion gases will be discharged upwardly through the stack 20. A suitable spark arrestor may be installed in the stack.

When a fire exists in the fire pot l2, a small quantity of air is permitted to leak around the feed doors 37 and 38 and because there is a continuous inflow of air around the access door 38, this door will remain in a cool condition so that it will not be dangerous to touch.

When additional supplies of combustible materials are to be fed into the incinerator fire pot, the handle 45 on the access door 38 will be urged downwardly causing simultaneous movement of the feed doors, and door 38 will move downwardly and re door 37 will move upwardly. As the re door 37 moves upwardly it will obstruct the fiow of air through the air inlet opening 31 and of course because combustion gases are continuously moving out of the re pot, air will be drawn into the fire pot through the feed passage 30 which has beenv opened by virtue of the shifting of doors 37 and 38. The inward ow of air through the feed passage 30 substantially precludes possibility of outward flow of smoke through the feed passage and also substantially precludes the possibility of a flash back through the feed passage 30 and the open doors. The doors 37 and 38 are so weighted so that the weight of one will substantially offset the weight of the other and when the doors are open they will remain open until manual urging closes the same.

It should be noted that in the construction of the incinerator, the upper and lower wall sections of the wall sheath 1412 and 14a respectively may be oriented in any desired position so that the access opening 29 will face the building wall W and so that the clean-out door 28 will face a free and unencumbered area so that ready access may be had for cleaning out the re pot.

It should be apparent that we have provided a new and improved incinerator having an air supply directing the air in such a manner that a turbulence is provided in the re pot to continuously remove collected ashes from the top of the combustible materials so as to continuously expose unburned combustible materials and thereby facilitate thorough and complete burning thereof.

It will also be apparent that we have provided a new and improved feed door assembly for an incinerator so as to cause the normal air inlet to be closed when the feed doors are opened and thereby cause air to move inwardly through the material feeding passage so as to prevent outward flow of smoke through the feed passage and also prevent flash backs from occurring when the feed s doors are opened.

It will, of course, be understood that various changes may be made in the form, details, arrangement and pro portions of the parts without departing from the scope of our invention which consists of the matter shown and described herein and set forth in the appended claims.

What is claimed is:

1. An incinerator comprising means defining a fire pot having a smoke and gas outlet and also having a wall defining a feed opening, enclosure means defining a feed passage communicating with said feed opening, said enclosure means also defining an air inlet also communieating with said feed opening, a feed door movably mounted in the feed passage in air flow-obstructing relation, and said feed door being shiftable for opening said feed passage and into air flow-,obstructing relation with said air inlet, and means guiding the feed door into and out of obstructing relation with the feed passage and air inlet, whereby when said feed door is shifted to permit material feeding access through the passage, the air inlet is closed to cause inward fiow of air through the passage and thereby restricting smoke and fiash backs outwardly through the passage.

2. An incinerator comprising means defining a fire pot with a smoke and gas outlet in the upper portion thereof, said means including a wall defining a forward opening, enclosure means defining a feed passage and also defining an air inlet both communicating with the feed opening, the air inlet being disposed above said passage and contiguous therewith, a feed door vertically movably mounted in the feed passage in obstructing relation and shiftable in air flow-obstructing relation with the air inlet, and means guiding the feed door in vertical movement into and out of obstructing relation with the feed passage and air inlet whereby to alternately open and close the air inlet and feed passage for supplying air into the fire pot.

3. The invention as set forth in claim 2 and including a downwardly projecting baille adjacent the feed opening and inwardly from the air inlet and said bathe being disposed in opposed relation with the air inlet, whereby to cause air to ow downwardly into the fire pot and cause turbulence in the air and combustion gases to produce progressive downward burning of materials accumulated in the fire pot.

4. The invention as set forth in claim 1 and an access door in the feed passage and disposed outwardly from said feed door, said doors and the enclosure means defining restricted air ow spaces around the doors permitting continuous limited air fiow around the doors and through the passage, whereby to cause continuous limited inwardly directed air flow through the feed passage for maintaining the access door in a cool condition to permit manual touching thereof.

5. An incinerator to be fed through a building wall, comprising means defining a fire pot having a smoke and gas outlet and also having a wall defining a feed opening, enclosure means adapted to extend through such a building wall and defining a feed passage communicating with the feed opening in the fire pot wall, an access door in the feed passage and a fire door in the feed passage and spaced from said access door in a direction inwardly toward the fire pot, said doors being adapted to be disposed adjacent opposite sides of the building wall, said enclosure means having a pair of door-receiving openings respectively disposed in the upper and lower sides of the enclosure and in vertical alignment with the doors to permit the doors to respectively shift upwardly and downward out of the feed passage, guide means adapted for mounting on the building wall above the enclosure means and an elongated flexible element longitudinally movably suspended on said guide means and supporting said doors for cooperative upward and downward movement, whereby one of the doors will be raised as the other of the doors is lowered to provide feeding access through the feed passage.

6. The combination with a building wall, of an incinerator having a fire pot on one side of the building wall and to be fed from the other side of the building wall, the fire pot having a wall defining a feed opening adjacent the building wall, the building wall having a feed opening 1n alignment with the opening in the tire pot wall, enclosure means defining a feed passage extending through the buildingwall and in communication with the opening in the fire pot wall, a fire door and an access door movably mounted in the feed passage adjacent the opposite sides of the building wall for opening and closing the feed passage, the fire door being disposed between the access door and the fire pot, said doors and said enclosure means defining restricted air flow spaces around the doors permitting continuous limited air ow around the doors and through the passage, whereby the continuous air flow prevents excessive heating of the building wall and access door and prevents travel of smoke outwardly through the access door.

7. The combination with a building wall, of an incinerator having a re pot on one side of the wall to be fed from the other side of the building wall, said fire pot having a wall defining a feed opening therethrough and adjacent the building wall, the building wall also having an opening therethrough in alignment with the feed opening in the fire pot wall, enclosure means defining a feed passage through the opening in the building wall and in communication with the opening in the fire pot wall, said enclosure means including a pair of telescopically related passage-defining sections projecting into the opening of the building wall from opposite sides thereof, said sections each having a movable feed door therein adjacent the corresponding side of the building wall and means guiding the feed door in movement into and out of obstructing relation whereby to facilitate ready and easy assembly of the enclosure means with the building wall to facilitate feeding of the incinerator through the wall.

References Cited in the file of this patent UNITED STATES PATENTS 184,865 Hayden Nov. 28, 1876 271,418 Carson Jan. 30, 1883 497,840 Thompson May 23, 1893 893,178 Luli July 14, 1908 952,651 Thompson Mar. 22, 1910 1,351,633 Epps Aug. 31, 1920 1,569,220 Downe Ian. 12, 1926 2,167,653 Holbrook et al Aug. 1, 1939 2,515,869 Gregg et al July 18, 1950 2,533,674 Locke Dec. 12, 1950 2,716,951 Ver Haigh Sept. 6, 1955 FOREIGN PATENTS 51,814 Sweden Ian. 25, 1919 

